kicad-snap_4.0.3-snap1

Install:

sudo snap install kicad-snap

or install downloaded file:

sudo snap install kicad-snap_4.0.3-snap1_amd64.snap

After install run in terminal (ignore errors):

snap run kicad-snap.kicad
sudo snap connect kicad-snap:locale-control ubuntu-core:locale-control
sudo snap connect kicad-snap:mount-observe ubuntu-core:mount-observe

Not works:

• open files (like text or pdf) from other programs;
• open documentation